Switch controller and method

Details Switch controller and method Switch controller and method

1995-01-13

1997-06-03

Brown, Thomas W.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

379377, 379385, 379252, 361119, H04M 1900

Patent

active

056362749

ABSTRACT:
A circuit and method for reducing power consumption during operation of a solid state switch that controls connection of a source of alternating current to a load includes a circuit for determining a voltage across the switch. The switch is operated upon receipt of both a command signal and an indication that the voltage across the switch is less than a predetermined value. When used in a telephone system subscriber line interface circuit (SLIC), the circuit controls two switches that connect an ac ring signal from an ring generator to a telephone. The voltage sensed across the switch may be converted to a low current level and the circuit embodied in an integrated circuit.

REFERENCES:
patent: 5103387 (1992-04-01), Rosenbaum et al.
patent: 5323461 (1994-06-01), Rosenbaum et al.
patent: 5428682 (1995-06-01), Apfel

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